To be honest I think that was a phenomenon of a certain era-The whole opening/headline dynamic has changed. The thing now is multiple artists, mostly owing to any one of them not having the audience draw for a solo tour. Everyone is opening for everyone. I believe there was and still is a lot of backroom negotiation about who is available i.e., who doesn`t have a conflicting schedule, and how generous is the main act. Are they okay with an opener that may be better than they are.